Product Feature: 1,Attractive appearance, quickly installation, big steel content, knock-down type, flexible transportation.Its recycle life time is more than 8 times with excellent performance on anti-seismic, anti-typhoon, durable etc. 2,Wall system: our exterior wall panel have many different types for choosing(single layer steel PPGI sheet, sandwich panel with EPS , Rockwool, EPS, Fiber, PU). Partition wall can be divided at you will. The panel has excellent performance on fireproof, waterproof, dampproof, heatproof, soundproof. The whole building structure:span calculation way: within 5K,single and double layers'span 1K=1820mm,the whole building's stability increase by length h(>6);